As the expert for driveline and chassis technology for rail vehicles, ZF Friedrichshafen AG showcases its new ZF-EcoWorld DMU transmission at the InnoTrans 2016. This will be the first public appearance of this powershift transmission at this leading trade fair event. Field tests are planned for 2017 with volume production expected by 2018. EcoWorld features six speeds, an integrated reversing function, integrated hydraulics and standardized electric interfaces. Attractive new functions can be implemented, such as sailing with the engines running or shut off.
The new six-speed transmission system is designed for a maximum input torque of 2,500 Nm. It achieves maximum efficiency and is equipped with a powerful torque converter. The transmission system only requires an electric interface directly connected to the control unit.
The integrated primary retarder, which only requires a small installation space, provides for strong braking power even at low speeds. In addition to the oil cooler that has been integrated into the transmission, a heat exchanger contributes to the high cooling performance of the EcoWorld. The improved heat management extends the oil change intervals and service life, making the transmission even more reliable and easier to service. This keeps the life cycle costs low.
The integrated reversing function protects components and reduces the external loads on them. Weighing in at just 560 kg, the EcoWorld is also the outstanding lightweight contender among powershift transmissions. It also requires less installation space.
Advantages adopted and advanced further
The EcoWorld also includes all the advanced technologies from the successful EcoLife Rail series. Featuring these advantages and other added functions, it is setting new standards among DMUs (Diesel Multiple Units).
Further potential unleashed: Compared with hydrodynamic transmissions, EcoWorld reduces CO2 emissions and achieves fuel savings of up to 20 percent. Another five percent can be saved by the sailing function depending on the route, engine type and load condition.
By lowering engine speeds, the EcoWorld also contributes to reducing noise emission levels. This significantly improves travel comfort for passengers.
A closer look at the technical specifications reveals that the ZF innovation, EcoWorld, is ideal for use as a drive transmission in new rail vehicles as well as for repowering. Repowering is generally the process of replacing older technologies with newer and above all, more efficient components when overhauling a vehicle. EcoWorld can be used for powerpacks as well as for separate assembly.
With these solutions, the operator can be sure that he is using a solution without third-party patent claims.